Thanks to the faculty of intelligence, humans can contemplate the consequences of actions.
Forests used to cover 99% of the entire earth at one point. What happened next is human civilization uprooted this green cover and built vast countries and empires for human dwelling.
In the Bhagavad Gita, Arjuna begins by having doubts about the battle with his kinsmen because of the fear of what may happen next.
āchāryāḥ pitaraḥ putrās tathaiva cha pitāmahāḥ
mātulāḥ śhvaśhurāḥ pautrāḥ śhyālāḥ sambandhinas tathā
etān na hantum ichchhāmi ghnato ’pi madhusūdana
api trailokya-rājyasya hetoḥ kiṁ nu mahī-kṛite
Teachers, fathers, sons, grandfathers, maternal uncles, grandsons, fathers-in-law, grand-nephews, brothers-in-law, and other kinsmen are present here, staking their lives and riches. O Madhusudan, I do not wish to slay them, even if they attack me. If we kill the sons of Dhritarashtra, what satisfaction will we derive from the dominion over the three worlds, what to speak of this Earth?– Bhagavad Gita, 1.34-35