Question

which option identifies ways that people positively affect earths resources?
use cars that emit fewer harmful gases, build dams, and stop using all resources
stop using all resources, increase mining efforts, and halt the runoff of factory waste into rivers and streams
build dams, use cars that emit fewer harmful gases, and halt the runoff of factory waste into rivers and streams
increase mining efforts, build dams, and use cars that emit fewer harmful gases

Explanation:

• "Stop using all resources" is impossible and impractical, so eliminate options with this.
• "Increase mining efforts" depletes Earth's non-renewable resources and harms ecosystems, so eliminate options with this.
• The remaining option has all positive actions: dams can manage water resources efficiently, low-emission cars reduce air pollution, and halting factory runoff protects aquatic resources.

Answer:

build dams, use cars that emit fewer harmful gases, and halt the runoff of factory waste into rivers and streams