Acid rain - Rain mixed with acids formed by gases released into the atmosphere when fossil fuels are burned., , Air pollution- The contamination of the atmosphere by noxious gases and particulates, , Deforestation-The process of destroying a forest and replacing it with something else, especially by an agricultural system., , Domestic garbage- Residential waste, , Pesticides- a chemical used to kill pests (as rodents or insects a chemical used to kill pests (as rodents or insects), , pollution - the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem, , water pollution - pollution of the water in rivers and lakes, , garbage- waste, , oil spill- the release of a liquid petroleum hydrocarbon into the environment due to human activity, , landfill- a location for the disposal of human waste be it domestic, commercial or industrial, , ozone hole- a region of the stratosphere over Antarctica (and a smaller one over the Arctic) that is depleted of ozone ., , nuclear waste- The radioactive products formed by fission and neutron transmutation of materials in a reactorThe radioactive products formed by fission and neutron transmutation of materials in a reactor, , greenhouse effect- increase in temperature caused when incoming solar radiation is passed but outgoing thermal radiation is blocked by the atmosphere, , global warming- warming that results when solar radiation is trapped by the atmosphere, , hurricane- an intense, rotating oceanic weather system that possesses maximum sustained winds exceeding 119 km/hr (74 mph), , industrial waste- Wastes from any factory, transportation apparatus, from scientific research, dredging, sewage and scrap metal., , drought- temporary abnormalities determined by deficient precipitationtemporary abnormalities determined by deficient precipitation, , endangered species- species whose numbers are so small that the species is at risk of extinction, , exhaust fumes - gases ejected from an engine as waste products, , flood - A form of natural disaster when there is more water than the lakes, rivers, oceans, or ground can hold.

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