Answer:
The two cycles are photosynthesis and cellular respiration.
Cellular respiration releases energy stored in glucose (during photosynthesis). Most of this energy is transferred to an energy molecule that can be used by all cells: ATP.
And the wastes of respiration are carbon dioxide and water, which are precisely the raw materials of photosynthesis in chloroplasts (forming two linked closed cycles).
Explanation:
The Carbon dioxide in the atmosphere is absorbed by green plants (producers) to make food in photosynthesis.
Human beings are naturally lazy and procrastinators, this means that they are more likely to judge others for not doing what they believe is the best but are often incapable of judging their own misbehaviour and to attempt to improve their own flaws and lack of self control—as most have.
there are two plausible explanations for this problem:
1) they’re waiting for someone else to clean the park.
2) the complaining has become an integrated part of their lives and they honestly probably don’t care enough; if they did, they would’ve cleaned it by now.