The correct answers are:
A) Nonrenewable resources create terrible pollution problems;
D) Once nonrenewable resources are used, they cannot be replaced, so we are not able to acquire more;
The nonrenewable resources are by far the most used resources across the globe. From side they are relatively cheap and are very efficient, but from the other side they are the biggest polluters and their reserves are becoming less and less. Being the biggest polluters, this resources create a lot of problems like the bad air quality, acid rains, and the climate change. Also, this resources are limited, so once the reserves of them are spent there will be no more of them, thus the humanity will be in big trouble if a proper solution is not found until then.
In F2 the bonding is pure covalent, with the bonding electrons shared equally between the two fluorine atoms. In HF, there is also a shared pair of bonding electrons, but the shared pair is drawn more closely to the fluorine atom. This is called a polar covalent bond as opposed to the pure covalent bond in F2.
Convection occurs over a very very long time in the earth's mantle. Rock slowly gets melted down from the core, then shoots back up from volcanoes. The new rocks get buried by sand and sediments, and the process resets.
Answer:
Olives, the answer is olives.
Answer:
by how deep they are
Explanation:
the deeper the fossil the older it is
