Human Activities and Natural Resources
A ____________ _____________ is a material or ____________ source that is found in ____________ and that is useful to ______________.
Resources that can be _______________ through natural ______________ are ______________ _______________.
Ex. ____________, air, ______________, and some living things such as _____________
Nonrenewable _________________ cannot be replaced by natural processes at the same ___________ as they are used.
___________ _____________, such as oil, ____________, rocks, ______________, and natural gas, are examples of ____________________ resources
A fossil fuel is an ____________ resource that formed from the ____________ of organisms that lived _____________ of years ago.
__________________ is the release of a ______________ substance, or ______________ into the environment.
People burn fossil fuels to get the ____________ they need to run ____________, power plants, and _______________.
_______________ have harmed the soil and water so much that it is ______________ for plants and ______________ to survive.
Burning these ___________ releases ______________ ______________ into the ________________.
Carbon dioxide _____________ heat from the _________ and keeps it from ______________ back into _____________.
Carbon dioxide is called a _____________ _________ because it acts like the _____________ of a greenhouse to ___________ heat from _________________.
________________ gases help keep _____________ warm enough for ____________ things.
Most scientists think that an _____________ in carbon ____________ is causing ____________ ________________.
Global _______________ is an _____________ in average _________________ throughout the world.
_______________ are often sources of _______________, but _____________ can also add ___________________ to water and soil.
Farmers may also _____________ their crops with ________________ called ______________.
_______________ are chemicals that kill _____________ and other animals that ___________ on crops.
_________________ involves processing used _______________ so that they can be used ____________ to make new _______________.
This means that ________________ such as metals, _____________, and wood can be used again instead of being ______________ away as _______________.
______________ can ____________ air pollution by ______________ less coal, _________, and natural gas.
They can use __________ power, ___________ power, and ___________ power to produce some of the ______________ energy they need.
Solar power is _______________ from the ________________.