THE evergreen, coastal conocarpus erectus, also called the conocarpus tree, isn’t native to Pakistan. It’s known for its dense foliage, fast growth and high tolerance for harsh environmental conditions. It can withstand humidity, saline soil, drought, strong coastal winds and high urban pollution. It is particularly attractive to cities facing environmental stress. The tree can reach heights of six to over seven metres within a few years. It has narrow leaves, a compact canopy and small button-like flowers, which is why it’s sometimes called the ‘buttonwood tree’.

In 2008, the then Karachi mayor, Mustafa Kamal,introduced this tree to rapidly increase the city’s green cover in response to growing urbanisation, dust pollution and rising temperatures. At that time, Karachi was expanding rapidly, with large sections lacking tree cover. The conocarpus tree was selected because it grows quickly, requires relatively little water, and can survive the coastal climate. Thousands of these trees were planted along roads, highways, parks and public spaces across Karachi.

For many residents, this plantation drive was initially seen as a sign of improvement. Within a few years, many previously barren roadsides began to look........

© Dawn