Question

Which problem did not face by the Europe in the first half of the 19th

century?

(a) unemployment

(b) competition from imports of cheap machine-made goods
(c) High food prices

(d) Agricultural over production​

Answer 1

Answer:

As carbon dioxide levels have risen, so have its effects on air pollution. Carbon dioxide accounts for less than 1 percent of the atmospheric gases. However, a delicate balance exists between carbon dioxide and other gases. The concern over carbon dioxide is the significant change over a relatively short period of time.

Explanation: