"Nature provides free lunch, only if we control our appetites." This is a powerful sentence. Nature cannot provide for a community that is taking faster than it can produce. Example, a mother with nine children cannot make them all lunch at once. Some will be served before others, and they will have to be patient. If all the children want seconds, the mother will be tired and may not be able to provide the second meal. Statistics from Webecoist state that, "Oxygen-starved dead zones that cannot sustain life now cover an area approximately the size of Oregon. Dead zones are caused by excess nitrogen from farm fertilizers, factory and vehicle emissions, sewage and other pollution runoff." Humans causing these large, and increasing, dead zones will cause an extreme depletion in sea life. These animals are dying due to human error.
went to Kenya last summer. ... past simple (specific from past, past simple) I play tennis every Friday. ... present simple (routine, simpler now) He isn`t studying at the moment. ... present continuous (something does not happen / happens at the moment of speaking, continuous time is continuous) They What were you doing yesterday between 3.00 and 5.00? ... past continuous (longer activity from past - past continuous) I`ve started this exercise. ... present perfect (something has started in the past and may continue) i`ll go to university. ... future with will (spontaneous utterance in the future, future simple) Is it going to rain tomorrow? ... be going to (going to refer to the nearest plans / intentions, here it is about the weather difficult to predict) I'm visiting my grandparents next weekend. ... present continuous for future (we are a contract, that's why our intention is not going to change, it's a continuous future applied to the future.
went to Kenya last summer. ... past simple (specific from past, past simple) I play tennis every Friday. ... present simple (routine, simpler now) He isn`t studying at the moment. ... present continuous (something does not happen / happens at the moment of speaking, continuous time is continuous) They What were you doing yesterday between 3.00 and 5.00? ... past continuous (longer activity from past - past continuous) I`ve started this exercise. ... present perfect (something has started in the past and may continue) i`ll go to university. ... future with will (spontaneous utterance in the future, future simple) Is it going to rain tomorrow? ... be going to (going to refer to the nearest plans / intentions, here it is about the weather difficult to predict) I'm visiting my grandparents next weekend. ... present continuous for future (we are a contract, that's why our intention is not going to change, it's a continuous future applied to the future.