*Question*
If burning fossil fuels increases atmospheric warming, then what increases when fossil fuels are burned? Answer choices: - Greenhouse gasses - Greenhouse gases - cancer - wood ash - atmospheric warming - coal - heat energy - Temperature
**Answer**
atmospheric warming

*Question*
If acid rain has a negative impact on plants, then what does acid rain have a negative impact on? Answer choices: - limestone - watershed - animals - humans - nitrogen - plants - soils - hydrogen
**Answer**
plants

*Question*
If growth often requires a lot of energy, then what often requires a lot of energy? Answer choices: - pigeons - monkeys - horizon - growth - humans - omnivores - waiting - distance
**Answer**
growth

*Question*
If metals become hot readily, then metals become what readily? Answer choices: - acid - evaporated - fats - zinc - penetrated - hot - permeable - rust
**Answer**
hot