1 You can reduce your footprint by
using renewable energy.
2 Coal and oil are examples of fossil
3 Growing
requires land so some
animals lose their natural habitat.
4 There are many different ideas about what the
next renewable source will be.
5 Vehicles contribute to acid
... as
they release pollutants into the air.
6 Major cities have a real problem with
pollution
7 Biofuels can even be made with vegetable​

Hi all, today I want to tell you about a great man who died too early, and it is about Kurt Donald Cobain. Kurt Cobain born on 20 February 1967 in the Grays Harbor hospital in Aberdeen, Washington. Kurt grew up in a musical family: his maternal uncle Chuck Fradenburg, performed by a group called The Beachcombers, aunt Mary Earl played guitar in various local bands, great-uncle Delbert had a career of tenor and even starred in the 1930 movie "King of jazz".Interest in music manifested itself quite early: according to his relatives, at the age of two years he gladly sang the songs of The Beatles. In four years he wrote his first song about a trip to the local Park. At the age of seven received a gift from my aunt a drum kit.In 1985 Kurt formed a band, called Fecal Matter, but soon the group changed its name to Nirvana.Kurt Cobain a great musician and performer, became famous for having played grunge and rock with his rock band.He died on 5 April 1994 because he was suicidal.

1) He lives in the same house (или My friend and I live in the same house, потому что "он живет в том же доме" не звучит). 
2) He studies at the Moscow Law Institute.
3) He is a first-year student.
4) He studies English (или My friend and I study English).
5) Неправильно составленное предложение у вас. Пусть будет 'We are working on making our English better (тогда это Present Continious)', следовательно He is working on making his English better (или My friend and I are working и т.д.)
 6) He is a future police officer (наверное, лучше употребить полиция, нежели милиция. Но можно и милицию оставить).
 7) He should visit his relatives on Saturday (или My friend and I should ...и тд.)
8) Неправильно составленное предложение. Будет 'I hope that I will go to Yaroslavl next summer' и тогда 'He hopes that he will go to Yaroslavl next summer'
9) He doesn't want to do it now.
10) He doesn't know this officer (или My friend and I don't know this officer).
 11) He finished secondary school 5 years ago.
 12) He will (will вместо shall) study many special subjects next year (или My friend and I will study и тд).
13) В году я не жил в Москве? ... Я не поняла, что хотелось сказать. Давайте переделаем на I was on vacation in Moscow last year (я отдыхал в Москве летом) и тогда He was on vacation in Moscow last year.