scientists claim the moon is moving away from the earth Not towards it friend
But the moon is it's only moving away from the earth at a rate of 3.8 cm a year, hardly nothing
Think about it but How could scientist have calculated if the earth was moving away from the earth 1000 years Ago.
And they don't know if it's moving away because of an orbital cycle. So it could start moving back soon
So this couldn't prove the age of the earth.
As for lack of plant life producing more or less oxygen because of lack of plant life, where do you think all the oxergen goes that has been produced by the earth upto now ?
Oxergen isn't flammable and the earths oceans soak a lot of it up
It hasn't left through some hole in space. It can only rise up so high because of atmospheric pressure that's why the further up you the less air there is
If any thing the earth is producing more oxergen because sea levels continue to rise.
When carbon molecules mix at the earths mantle drawn in by volcanoes
Plants when they burn that are full of oxergen, release there oxergen up into the air, and where there's been a fire the land will grow back a lot richer because of the potassium burning wood creates.
Plus more and more people are planting more trees then ever befor now so when they burn, again more oxergen

but the oxergen doesn't disappear
But the funny thing is we don't have huge animals or mosquitoes even tho theres clear indication there's more oxygen in the earth now than ever befor so the scientific theory of things being bigger on earth because there was once more oxergen on earth is incorrect and sent you in the wrong direction And it can not determine the age of the earth or it's foundations age.
As water levels continue to rise
Scientists now believe the earths mantle is producing water by its self,
Scientist also believe half of the earths oxergen comes from the oceans