Why has the AGL (ASX:AGL) share price climbed 14% in a month?

Until recently, the AGL Energy Limited (ASX: AGL) share price had something of a reputation as a wealth destroyer. After all, this is a company that remains down 49.88% year to date in 2021 so far. As well as down 55% over the past 12 months, and 98.3% over the past…