生物英文問題!!專家幫忙! - 社會議題

1.we are currently worried that sources are out of balance with sinks can remove then carbon dioxide in the atmosphere will increase possibly leading to global warming what might happen if the reverse were true and sinks took up more than sources
2.within biosphere 2 scientists found that the carbon dioxide levels decreased each day and increased each night what would account for these change ?
這提中文翻譯 和要怎麼回答?