As of 2024, China is the largest overall contributor to global greenhouse gas emissions

Explore which sectors produce the most greenhouse gas emissions by country

As of 2023, the energy sector, including electricity and heating, accounts for the largest share of greenhouse gas emissions. The 10 largest greenhouse gas-emitting nations account for two-thirds of global emissions, with the world's top three—China, the US, and India—contributing 15 times more than the bottom 100.

The world's wealthiest 10% are responsible for 48% of greenhouse gas emissions

An analysis by the International Energy Agency found that in 2021, the top 1% of emitters each produced over 50 metric tons of carbon dioxide, over 1,000 times the amount produced by those in the bottom 1%. The average energy-related carbon footprint, including household heating and electricity use, was about 4.7 metric tons per person.

Yearly greenhouse gas emissions have been steadily increasing since 1850

Although greenhouse gases include methane, nitrous oxide, and most fluorinated compounds, their warming potential is often measured relative to carbon dioxide. In these units, greenhouse gas emissions have gone from 4.29 billion metric tons of carbon dioxide equivalent in 1850 to 54.43 billion metric tons in 2024.

Carbon dioxide is the most produced greenhouse gas from human activities

In 2022, about 79.7% of US greenhouse gas emissions were carbon dioxide, produced through chemical reactions in processes such as cement production and the burning of fossil fuels, solid waste, trees, and other biological materials. Methane (11.1%), nitrous oxide (6.1%), fluorinated gases (3.1%), and trace amounts of solid and liquid aerosol were also created.

China is the world’s largest importer of crude oil

China is pushing to reduce its reliance on US oil to limit geopolitical vulnerabilities. It’s rapidly becoming the world’s renewable energy superpower.

Ranking the world’s economies: 1980 vs. 2025

The US remains the world’s largest economy, having increased its annual gross domestic product from $2.9T in 1980 to $30.6T in 2025. In 1980, China ranked seventh globally with a GDP of $304B. In 2025, China ranked second with a GDP of $19.4T.

View a ranking of the countries with the largest helium reserves, led by the US

Estimated at 20.6 billion cubic meters (727.5 billion cubic feet) as of 2022, US helium reserves are more than double those of Qatar, the second nation on the list. Leading the world in natural gas production, from which helium is recovered, the US also leads global helium production, which helps mitigate shortages resulting from overseas geopolitical tensions.

China's tree belt around the Taklamakan Desert has become a carbon sink

Decades of planting trees along the Taklamakan Desert in northwest China (the world's largest shifting-sand desert) have increased vegetation enough to create a measurable carbon sink, absorbing more carbon dioxide than the area emits. The effort demonstrates a key large-scale climate mitigation strategy, though it has raised concerns over water use and long-term sustainability.

About 10% of the world's crude oil and 32% of its natural gas is reached via fracking

Most of the world's shale oil resources—which are recoverable via fracking—are found in Russia, the US, China, Argentina, and Libya. The majority of equivalent shale gas resources are found in China, Argentina, Algeria, the US, Canada, and Mexico.

Tracking annual working hours per worker in major countries

In 2023, China's workers averaged 2,328 hours per year, far ahead of the second country on the list, the United States, at 1,789. This chart shows the relative decrease of total work time across the world since the late 1800s.

Cryptocurrency and data center growth are expected to increase greenhouse gas emissions

An analysis from the Open Energy Outlook Initiative estimates a 30% increase in emissions through 2030, as growing energy demands in regions where data centers are being built (20%-30%) far exceed the traditional growth rate of utilities in those areas (1%-2%). The emissions spike is expected to equal France's annual carbon output.

How cigarettes took over China

In 2022, China had a fifth of the world's population and bought nearly half of the world's cigarettes. This investigation explores how China became plagued by tobacco consumption, something epidemiologists say will strain the country's health system...

As of 2022, China has the largest reserve of rare earth elements

At 37.9% of estimated global reserves, China possesses twice the amount of REEs as Vietnam, the next closest nation. REEs, or lanthanides, are a set of 17 elements on the periodic table, which, alongside scandium and yttrium, share similar chemical properties that make them difficult to separate from within ores.

China doubled its nuclear stockpile between 2020 and 2025, with plans for further expansion

China's arsenal grew from an estimated 300 warheads in 2020 to approximately 600 in 2025—making it the world's third-largest nuclear power. The US Department of Defense projects that China will surpass 1,000 warheads by 2030.

Mapping Claude's relative usage worldwide, led by Israel, Singapore, and the US

According to Anthropic's AI Usage Index, the US leads in total users, but Israel and Singapore have higher adoption rates among their working populations. Excluding nations with insufficient numbers of conversations for analysis, Tanzania and Angola rank last in the index.

View a breakdown of worldwide oil production since 1900, mostly led by the US

When analyzing the production of crude oil, shale oil, oil sands, and condensates since the start of the 20th century, Saudi Arabia produced more crude oil only in 1977, from 1979 to 1981, and from 1991 to 2016. Nations such as Iraq and the United Arab Emirates produced much smaller quantities than both Saudi Arabia and the US.

What should you eat to help the climate?

Climate change is impacted by what we eat and what we don't eat. Did you know, for instance, that livestock accounts for 14.5 percent of the world’s greenhouse gases each year? Eating less meat and dairy and more protein-rich plants like beans,...

The number of billionaires in Saudi Arabia is projected to increase by 183% by 2031

Countries in the Middle East and Asia are projected to have some of the largest economic expansions by 2031, including within their billionaire populations. The global average growth projection for billionaires is 26% between 2026 and 2031.

America generates more trash per person than any other country on Earth

The US produces roughly 292 million tons of municipal solid waste per year, about 4.9 pounds per person per day. Municipal solid waste includes food scraps, packaging, electronics, yard trimmings, and more. About 50% of the waste ends up in a landfill.

China had an inflation rate of -0.4% in August 2025

As opposed to other G20 countries that are largely struggling with high inflation rates, China is facing deflation. Sluggish growth in the country's once booming real estate market is just one glimpse into the consumer slowdown triggering deflation.

China reports the highest prevalence of hearing loss and South Africa reports the lowest

This conclusion comes from research published in 2025 that analyzed self-reported hearing loss and hearing aid use from long-term studies that covered 28 countries. Its findings included that the countries with the greatest prevalence of hearing loss (China, South Korea, Mexico, and Brazil) also had the lowest levels of hearing aid use.

As of January 2025, Tesla is the second best-selling EV company in the world

Chinese automaker BYD saw nearly three times as many registrations of electric vehicles as Tesla through the sales of its plug-in hybrid and battery electric vehicles. Fellow Chinese competitor Geely sold 12.7% of all BEVs worldwide, surpassing Tesla's 12.4% share during the same period.

Carbon markets incentivize companies to cut emissions but require high carbon prices

To reduce greenhouse gas emissions, a cap-and-trade system issues a limited number of emissions permits—carbon credits—that decrease each year, cutting into a company's profits if it does not reduce emissions and must buy permits from others. However, cheap permits and minimal fines for lacking permits have reduced the system's effectiveness.

Nearly half the oxygen we breathe comes from photosynthetic plankton, not plants

Although the Amazon Rainforest is considered the "lungs of the Earth," it only produces 20% of the planet's oxygen, while phytoplankton, or microalgae, generate more than twice as much, despite making up less than 1% of the total mass of photosynthetic organisms on the planet. Through photosynthesis, microalgae also absorb up to 40% of global carbon emissions.

Switzerland's household debt totals 125% of its GDP

Switzerland, Australia, and Canada are among the countries with the highest household debt in the world. This debt typically includes mortgages, automotive loans, credit card debt, and personal loans.

The price of gas is a composite made up of several different factors, with the federal gas tax making up less than 20% of what drivers pay at the pump.

Electrical grids worldwide must double their power delivery capacity by 2050 to meet surging demand from AI and electric vehicles.

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

In 2026, Finland was named the world's happiest country for the ninth consecutive year based on its wealth, social safety network, and high life expectancy, among other factors.

The US dollar is the most widely circulated currency in the world, and is involved in nearly 90% of global transactions

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

Scientists can determine Earth's past climate conditions by analyzing air trapped in microscopic bubbles within ice cores—columns of compressed snow layers that build up over hundreds of thousands of years.

Poison ivy will likely become both larger and more resilient due to climate change.

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

The most expensive ad of all time was for Chanel No. 5 perfume and cost roughly $33M to produce in 2004—about $57M in today's dollars.

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in casualties, forces mobilized, and displacement of civilians.

11 people died from firework injuries in the US in 2024.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

Double world record holder Hunter Ewen helped conquer his fear of balloons, called globophobia, by training to win Guinness World Record titles for balloon inflation.

Dozens of S&P 500 stocks, including Coca-Cola and Walmart—known as the dividend aristocrats—have increased dividends every year for 25 years

How fusion—which releases energy when two lighter atoms combine to form a heavier atom—differs from fission

Brandi Chastain, the star of the 1999 US victory over China in the 1999 Women's World Cup, was a last-second choice to take the penalty kick that sealed the victory.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by over 1.5 million Muslims.

Before humans, the Soviet Union and the United States sent animals—including apes, dogs, and cats—to space during the Space Race.