Which of the following is a possible factor that has prevented humans from making changes that would allow them to rely entirely on nonrenewable resources?

question 2 options:

a)

politicians have removed all barriers, they just need the money.

b)

the idea that since nonrenewable resources are still available, there is no need to switch yet.

c)

efficient technology doesn't always exist.

d)

both b and c

e)

all of the above

d) both B and C

Explanation:

Although it has been proven that non-renewable resources such as petroleum are indeed running out and are no infinite, many people believe that there are enough non-renewable resources left on the planet to not worry too much about investing all our resources in renewable energy. This reality will only change with a better education system.

It is also true that efficient technology does no always exist and that when it does can be quite expensive. A good example is the difficulty of storing excess solar or wind energy to be used when atmospheric conditions cause a drop in production.

20: 5

explanation:

about 20% of the world's population lives in   southwest asia, but on less than 5% of the world's   land area.