गंभीरता के साथ।

प्रदूषण वातावरण को गंभीर रूप से प्रभावित करता है।
गंभीर रूप से, गम्भीर रूप से

To a severe or serious degree.

Fingers so badly frozen they had to be amputated.
Badly injured.
A severely impaired heart.
Is gravely ill.
Was seriously ill.
badly, gravely, seriously, severely