How can you use a single parallel sentence to combine the sense in these two sentences? i regularly drudge five days a week. i habitually sleep through the weekends. i am used to drudging five days a week and sleep through the weekends. i am used to drudging five days a week and sleeping through the weekends. i am used to drudge five days a week and to sleep through the weekends. i am used to drudge five days a week and sleeping through the weekends.

The correct answer is 'I am used to drudging five days a week and sleeping through the weekends", because in a parallel sentence, there has to be the same form of the verb, in this case it is a participle. The other examples cannot be correct, because the scheme differs (the first verb is a participle, and the second one is infinitive, or vice versa, which is not correct in a parallel sentence) and "I am used to drudge five days a week and to sleep through the weekends" could be correct because there is the same verb form (both are infinitives), but since 'used to' has to be followed by a verb + -ing, it cannot be correct. 

Ascenario where we impact the environment is when humans/ us litter outside or in the ocean which causes wild life to die or even extinct and also if we keep cutting down our trees we might not even have oxygen to live humans also keep limiting water resources wasting it s