Question

what can be a direct result of climate change on human activities?
a. fewer changes in weather
b. reduced impact on agriculture
c. increased challenges in farming, water supply, and living conditions
d. improved stability in local environments, leading to less air pollution

which gas is a major contributor to climate change?
a. nitrogen
b. carbon dioxide
c. helium
d. oxygen

Explanation:

• For the first question: Climate change leads to more extreme weather events (so a is wrong), has a negative impact on agriculture (so b is wrong), and causes instability in local environments (so d is wrong). It does increase challenges in farming (due to altered precipitation and temperature), water supply (changes in hydrological cycles), and living conditions (more extreme weather affecting infrastructure etc.).
• For the second question: Carbon dioxide is a major greenhouse gas that traps heat in the atmosphere and contributes significantly to climate change. Nitrogen, helium, and oxygen are not major contributors to climate - change in the way carbon dioxide is.

Answer:

c. Increased challenges in farming, water supply, and living conditions
b. Carbon dioxide