The Earth is about 4.6 billion years old.

Answer the following statement true (T) or false (F)


True

Environmental & Atmospheric Sciences

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Which one of the following reduces net GDP?

A) A coal-fired power plant that pollutes the air B) Manufacture of products to clean polluted water C) Clear-cutting and logging of 1,000 acres of pine trees D) Degradation of farm equipment

Environmental & Atmospheric Sciences

Biodiversity enhances human food security because it ________

A) decreases the number of predators B) is a potential source of new food items or new genetic varieties of existing foods C) increases the number of available pathogens D) means that there is genetic uniformity E) reduces the number of pollinators available to any one plant species

Environmental & Atmospheric Sciences

Freshwater passing through uplifted sediments containing quick clay changes the sea salt content leaving quick clay with all but which of the following?

A. water contents commonly in excess of 50 percent B. grains mostly less than 0.002-mm diameter C. a higher salt content D. weak structure

Environmental & Atmospheric Sciences

Subduction zones are downgoing convection cells in the earth but only carry oceanic material into the mantle

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences