Lines in the text that support the title ‘The Ailing Planet’ are :

‘The earth’s vital signs reveal a patient in declining health’.

“...biologists reckon that about three to a hundred million other living species still languish unnamed in ignominious darkness”.

“Are we to leave our successors a scorched planet of advancing deserts, impoverished landscapes and ailing environment ?”

“... these systems are reaching an unsustainable level, a point where productivity is being impaired”.

“We see ... the survival not just of the people but of the planet.”