Question

question 1
describe ways that water pollution occurs.
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question 2
describe how greenhouse gases contribute to climate change.
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question 3
how does an area qualify as a biodiversity hotspot?

Explanation:

Question 1: Water pollution can occur through industrial waste discharge, sewage over - flow, agricultural runoff containing pesticides and fertilizers, and oil spills. Industrial activities release heavy metals and chemicals into water bodies. Sewage systems may fail to treat waste properly. Agricultural runoff carries pollutants from farms into water sources. Oil spills from ships or offshore drilling contaminate water.
Question 2: Greenhouse gases like carbon dioxide, methane, and nitrous oxide trap heat in the Earth's atmosphere. They allow sunlight to enter but prevent some of the heat from escaping back into space, creating a greenhouse effect. As the concentration of these gases increases due to human activities such as burning fossil fuels and deforestation, more heat is trapped, leading to global warming and climate change.
Question 3: An area qualifies as a biodiversity hotspot if it has a high number of endemic plant and animal species (species found nowhere else) and has lost at least 70% of its original natural habitat due to human - induced factors like deforestation, urbanization, and agriculture.

Answer:

Question 1: Industrial waste discharge, sewage overflow, agricultural runoff, oil spills.
Question 2: Greenhouse gases trap heat in the atmosphere, increasing global temperatures due to the enhanced greenhouse effect from human - caused emissions.
Question 3: High number of endemic species and significant habitat loss.