Anthropogenic (human-induced) changes in the Earth System Choose one: A. are decreasing as technology leads to more environmentally friendly practices. B. are responsible for natural contaminants such as soot, dust, and organic waste. C. include global warming, which is greatly enhanced by society's production of greenhouse gases. D. began as early as 20,000 years ago as humans began to modify ecosystems.

C. include global warming, which is greatly enhanced by society's production of greenhouse gas

Explanation:

Human activities such as burning of fossil fuel, industrial waste has lead to the emission of greenhouses such as carbondioxide, carbon monoxide, methane, chlorofloro carbon accumulation of which in the atmosphere leads to global warming as a result of the depletion of the ozone layer and the direct impact of sun on the earth.

The depleted ozone layer has lead to the constant and high temperature

that is affecting the earth.

Green plant,trees are natural users of carbondioxide but deforestation of this trees has also reduce the use of carbondioxide making it abundant in the atmosphere.

doctrine that the us had the right to expand throughout north america.

it sounds like either a or c