Global warming
Global warming is when the earth starts to heat up. I think that we can prevent global warming, but we choose to ignore the problem. The earth has gone through global warming. For example the ice age were cause by global warming. It can affect us human and the environment. Some causes are glaciers melting, ocean levels will rise. extreme weather (temperture drops or goes to high), and the ecosystems will change. I feel that no one cares or pays attention to it because no one does research or know what it can actaully happen.