关键词: 人口爆炸, 土地退化, 气候变化, 粮食安全

Abstract:

Human is an important functional unit in the ecosystem and has producted great impact on the environment of the earth. With the rapid growth of population and unsustainable exploitation of natural resources during the process of social and economic development， the reduction of forest areas， land degradation， water scarcity， global temperature rise， and severe damage to biodiversity have occurred， leading to a significant decrease in crop yield and a growing food security problem. This paper introduced the current situation of food security issues and their main causes，also present various measures to address food security issues， such as promoting the development of green energy， reducing greenhouse gas emissions， adjusting research objectives and methods， advocating for diversified planting models， and improving food productivity. These sustainable development strategies aimed to collectively tackle the challenges of food security and achieve harmonious coexistence between humans and the earth， which was expected to provide reference for addressing food security issues.

Key words: population explosion, land degradation, climate change, food security