"Lessened" refers to the act of reducing or diminishing something in size, amount, or intensity. It can apply to various contexts, such as emotions, physical objects, or situations. For example, if a person's anxiety has lessened, it means they feel less anxious than before. In a broader sense, lessening can occur in environmental contexts, such as the reduction of pollution levels in a city. Efforts to lessen climate change impacts often involve implementing sustainable practices and policies to decrease greenhouse gas emissions and promote renewable energy sources.