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The Earth has been getting warmer in the past 100 years. It is called global warming. Since 1992, the warmest temperatures have been recorded on the Earth each year. Scientist tried to find out why the Earth was becoming warmer, so they studied the oceans and the air to understand the reasons. They found out that human beings caused temperatures to go up.
People have been burning fossil fuels like petroleum, coal and natural gas. As the world became industrialized and the population grew, people burned more and more fossil fuels. This caused carbon dioxide levels to go up. The carbon dioxide also filled the air. It acted like a blanket that kept the Earth warmer, so the land, air and oceans began to heat up quickly.
People have been burning fossil fuels like petroleum, coal and natural gas. As the world became industrialized and the population grew, people burned more and more fossil fuels. This caused carbon dioxide levels to go up. The carbon dioxide also filled the air. It acted like a blanket that kept the Earth warmer, so the land, air and oceans began to heat up quickly.