Doctors and builders will have less work if people are healthier and buildings are stronger.
医者 = doctors
作業員 = builders
人々が健康になり = if people are healthier
壊れにくい建物が増えれば = if buildings are stronger
回答のように表現すれば、日本語の意味は伝わると思います。
I hope this answer will help you.
お役に立てれば嬉しいです。