This document discusses plant tolerance to climate change and abiotic stresses like drought and soil salinity. It notes that climate change caused by human activities is causing more extreme weather events like droughts that threaten global agriculture and food security. Plants have developed tolerance mechanisms to cope with stresses, but their sedentary nature makes adaptation difficult. The document reviews research on stress response pathways and genes that confer tolerance to drought and salt when overexpressed. It argues that improving stress tolerance in crops through transgenic and molecular breeding approaches will be crucial to ensuring food security in a changing climate.