内容摘要：But scientists say just looking at last year’s emissions doesn’t really show who caused the problem. That’s because carbon dioxide stays in the atmosphere for

But scientists say just looking at last year’s emissions doesn’t really show who caused the problem. That’s because carbon dioxide stays in the atmosphere for

, that upheld the right of public school students to wear black armbands to protest the Vietnam War when it did not create a substantial disruption to education.mess the world is now in? More than half of the world’s heat-trapping gases comes from three places: The United States, China and Europe.

And it piles up quickly at more than 2.5 million pounds (1.1 million kilograms) per second.Once heat trapping gases get into the atmosphere, the effects are global. Trapping the sun’s energy doesn’t stop at national borders. But scientists can track where the gases come from and thusEDITOR’S NOTE: This story is part of an ongoing series answering some of the most fundamental questions around climate change, the science behind it, the effects of a warming planet and how the world is addressing it.

Even though carbon dioxide is light and invisible, the amount put in the air by the world’s nations through the burning of coal, oil and gas and the making of cement adds up to massive numbers. Since 1959, the world has spewed 1.55 trillion tons (1.41 trillion metric tons) of carbon dioxide, according to, a group of scientists who track emissions and publish in peer review scientific journals.

In 2020, the last year for full national data, China spewed more than 11.7 billion tons of carbon dioxide (more than 10.6 billion metric tons), which is 30.6% of the globe’s carbon dioxide emissions and more than twice as much carbon pollution as the United States which was the next highest emitter at 13.5%, scientists calculated. The European Union, when lumped together, comes in third at 7.5% followed by India’s 7%.

But scientists say just looking at last year’s emissions doesn’t really show who caused the problem. That’s because carbon dioxide stays in the atmosphere forThe complex economic and political crisis in Venezuela has driven more than 7.7 million people to leave the South American nation since 2013. Venezuela’s most recent economic troubles pushed year-over-year inflation in April to 172%. The latest chapter even prompted

last month. Maduro, whose reelection last year to a third term has been condemned internationally as illegitimate, also has cracked down on his political opponents.In the dispute over TPS, the administration has moved aggressively to withdraw various protections that have allowed immigrants to remain in the country, including ending the temporary protected status for a total of 600,000 Venezuelans and 500,000 Haitians. That status is granted in 18-month increments. Venezuela was first designated for TPS in 2021; Haiti, in 2010.

Last week, DHS announced that TPS for Afghanistan, first provided in 2022, would end in mid-July.The protections for Venezuelans had been set to expire April 7, but Chen found that the expiration threatened to severely disrupt the lives of hundreds of thousands of people and could cost billions in lost economic activity.