People today are worried about many problems with the Earth. One of the biggest problems is climate change, or global warming.
Scientists say Earth is getting warmer faster than ever before. Most experts say humans are causing this. Factories, cars, and other things we make release greenhouse gases like carbon dioxide. These gases trap heat in the air. As the oceans get warmer, glaciers melt and sea levels rise. This means less space for animals like polar bears. It also affects where people can live. Over time, global warming could hurt all living things.
In 2015, people from 195 countries met in Paris, France. They talked about how to help Earth. They made a plan called the Paris Agreement. The plan was meant to reduce pollution. It started in late 2016. Paris lit up the Eiffel Tower and Arc de Triomphe with green lights to celebrate. Later, President Trump took the United States out of this agreement.
