Answer:
Fossil fuels contribute to greenhouse gases, which is one of their major disadvantages. The most harmful for the environment is coal because it has many more harmful combustion products than other fossil fuels.
You can simply subtract the atomic number from the mass number in order to find the number of neutrons.
Size and Temperature or E & B
Explanation:
velocity
I believe it's D
they both are worked a lot and it makes the most sense.
