<p>Green composites aiming to find ecofriendly ingredients and save natural resources have been widely investigated for years using agricultural and industrial wastes and by-products natural biomaterials etc. Besides the basic mechanical performance of green composites the life-cycle performance of green composites under single/multiple environmental conditions should also be worthy of attention since green ingredients sometimes reduce the durability performance of green composites especially under fire/high temperatures freeze-thaw cycling dry-wet cycling and salt corrosion. The aim of this Special Issue was to publish papers that advance the life-cycle performance of green composites under complex environmental conditions.</p>