The food chain ?
Sun
Primary producers
Primary consumers
Secondary consumers
Tertiary consumers
Answer:
False
Explanation:
Most scientists were not yet concerned about global warming. This was because the major issue during the period between 1940 and 1970 was global cooling with little or no attention on global warming.
However things started to change due to more pollution as a result of technological advances. Global warming started becoming a concern between 1970s and 1990s because of the increase in steady surface temperature.
Answer:
both options 4 and 3 is the answer..
the answer is true, hope this helps :)
