Global Climate Change?

As humans burn more fossil fuels like oil and coal for energy, more carbon dioxide enters the atmosphere. Carbon dioxide acts like a greenhouse, letting sunlight and heat into the lower atmosphere, but not letting them back out. Other gases, including methane and nitrous oxide, released into the atmosphere due to human activities also contribute to global warming. As a result, average yearly temperatures on Earth have risen

Climate changes will alter the ecosystems in which many species—including humans—live. If a species requires a certain temperature or certain amount of water to live, it could face extinction if global climate change alters its environment. Other species—such as mosquitoes, certain diseases, and some pests—may flourish and expand their ranges.