<span style="color: #222222;">Maharashtra Chief Minister Uddhav Thackeray today stressed the need to plan development works by taking into consideration the laws of nature. He was speaking at an event organised to mark World Environment Day. Mr Thackeray said, our culture encourages preserving and conserving the environment and it is important to understand the laws of nature while planning development works. <br />''<br />''He added that the green cover is disappearing from the urban landscape. He further said due to Corona virus, we now realise the importance of oxygen and are now upgrading the oxygen production facilities. He also called for protection of mangroves.</span><br />