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Human civilization has been changing the Earth's environment for millennia, often to our detriment. Dams, deforestation and urbanization can alter water cycles and wind patterns, occasionally triggering droughts or even creating deserts.

We forget that the water cycle and the life cycle are one.

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

There is a majority of scientists that say that global carbon emissions by humans causes some changes in the climate.

Human activity is having a major impact on the planet. We consume or have diverted a large proportion of the productivity of the land and oceans. Our hunger for land crowds out fellow species. Our waste products pollute the waters, warm the atmosphere and acidify the oceans.

Humans have obviously contributed a great deal of carbon to the atmosphere. So we are warming the planet up.

With our evolved busy hands and our evolved busy brains, in an extraordinarily short period of time we've managed to alter the earth with such geologic-forcing effects that we ourselves are forces of nature. Climate change, ocean acidification, the sixth mass extinction of species.

Pollution from human activities is changing the Earth's climate. We see the damage that a disrupted climate can do: on our coasts, our farms, forests, mountains, and cities. Those impacts will grow more severe unless we start reducing global warming pollution now.

Water is the driving force of all nature.