You didn't put any options but an example of biological weather can be the weakening of a substance such as a rock being broken down due to various plants(... so nothing man made). Hope this helps :)
Can you make the picture clearer
High altitude in the barometer indicates low pressure. This is also an indication of a bad weather like Storm. and inclement weather. A decreased altitude, however, indicates a calm and pleasant weather. So, in your case, a storm is coming.
Answer: Are there any options? you either add C02 because it has run out gas or you and in minerals that also contain C02.
Explanation: you need C02 to have photosynthesis, so with a closed off lid, the gas is going to eventually run out.
