Answer:
Pollution.
Explanation:
Due to constant increase of in pollution on Earth scientists have decided to colonize on Mars by 2030.
An irregular verb is one that does not form its simple past tense or its past participle by adding "-ed" or "-d" to the base form. Irregular verbs contrast with regular verbs, which form the simple past tense and past participle by adding "-ed" or "-d."
Hamel the French teacher is referred to as the poor man because it was his last lesson in the school. ... ... The old men of the village came to the school that day to thank M. Hamel for his forty years of faithful service. They also came to show their respect for the country that was theirs no more.
