Could you please check these sentences? Thank you. In particular, I'm not sure about the use of "none" as a pronoun and a few words concerning ecology.

1) I give people a lot of/lots of/a few/few/no presents for Christmas.
I don't think "none presents" is possible. Is " I give people none" possible?
2) A lot of/lots of/ a few/few/none of my friends speak French.
3) I have a lot of/a little/little/no (but not none?) sugar.
Go and get some sugar. I've got none at home.
4) Environmentally friendly people only use disposable plastic bags.
They regularly sort their rubbish into separate bins.
5) They also use alternative energy like solar or wind power.They never drop litter on the ground or make rivers or other waterways dirty.
6) They always use recycled paper and follow a healthy diet consisting of a lot of fruit and vegetables.
7) The population of my town is three times as big as that of Milan (Could you say "three times biggen than that of Milan"?). It is a lot/a bit bigger than that of Milan.

1) I give people a lot of/lots of/a few/few/no presents for Christmas.

I don't think "none presents" is possible. Is " I give people none" possible? You're right. "none presents" is incorrect. It would be better to phrase the negative this way: I don't give people any presents.

2) A lot of/lots of/ a few/few/none of my friends speak French.
All are fine.

3) I have a lot of/a little/little/no (but not none?) sugar.
Go and get some sugar. I've got none at home.
Correct

4) Environmentally friendly people use only disposable plastic bags.
They regularly sort their rubbish into separate bins.
See this for placement of "only": " target="_blank">http://grammar.ccc.commnet.edu/grammar/modifiers.htm

5) They also use alternative energy, such as solar or wind power. They never drop litter on the ground or make rivers or other waterways dirty.

6) They always use recycled paper and follow a healthy diet consisting of a lot of fruit and vegetables.
While there's nothing grammatically wrong with this sentence, it seems odd to put people's recycling habits together with their eating habits!!

7) The population of my town is three times as big as that of Milan (Could you say "three times biggen than that of Milan"?). It is a lot/a bit bigger than that of Milan.
Correct, if you use "bigger" rather than "biggen"!!

1) In the sentence "I give people none," "none" is used as a pronoun meaning "not any." However, it is not typically used directly before a noun like "presents." Instead, it is more common to say "I don't give people any presents" to express the absence of gift-giving.

2) In the sentence "A lot of/lots of/a few/few/none of my friends speak French," all of the options are grammatically correct, but the meaning varies:

- "A lot of/lots of my friends speak French" means that a large number of your friends can speak French.
- "A few of my friends speak French" means that a small number of your friends can speak French.
- "Few of my friends speak French" means that not many of your friends can speak French.
- "None of my friends speak French" means that not a single one of your friends can speak French.

3) In the sentence "I have a lot of/a little/little/no sugar," all options except "none" are grammatically correct:

- "I have a lot of sugar" means you have a large quantity of sugar.
- "I have a little sugar" means you have a small quantity of sugar.
- "I have little sugar" means you have almost no sugar.
- "I have no sugar" means you have completely run out of sugar.

However, using "none" in the sentence "Go and get some sugar. I've got none at home" is grammatically correct. It is used as a pronoun to mean "not any."

4) The sentence "Environmentally friendly people only use disposable plastic bags" suggests that environmentally friendly individuals do not use disposable plastic bags. However, it would be more environmentally friendly to use reusable bags instead.

5) The sentence "They never drop litter on the ground or make rivers or other waterways dirty" describes environmentally friendly behavior. It states that environmentally friendly individuals avoid littering and polluting rivers or other water sources.

6) The sentence "They always use recycled paper and follow a healthy diet consisting of a lot of fruit and vegetables" highlights more environmentally friendly actions. It states that environmentally friendly individuals consistently use recycled paper and maintain a healthy diet by consuming plenty of fruit and vegetables.

7) The sentence "The population of my town is three times as big as that of Milan" is grammatically correct. Using "three times bigger than" instead of "three times as big as" is not correct. The correct comparative form is "three times as big as" when comparing two populations.