It is impossible to look out over the winding waterways and lush green wetlands of the magnificent Okavango Delta and fail to understand the importance of conserving the natural world.

A World Heritage Site teeming with plants, fish and birds and home to some of the planet’s most endangered animals, the delta is one of Botswana’s – and Africa’s – most impressive natural jewels.

It is clear that the world has a moral obligation to save areas of wild beauty like these: the planet would be poorer without them.

But it’s not only about saving nature for nature’s sake. It is also about recognising that the natural world, when looked after correctly, can contribute immensely to tackling some of the most critical problems facing humanity, from hunger to poverty, disease to climate change.

Here in sub-Saharan Africa, more than 70 per cent of people depend on forests and woodlands for a living. Ecosystems like the Okavango Delta play a key role in Botswana’s economy, providing livelihoods for herders, farmers and fishermen alike in addition to the revenue accrued from tourism.

If we are to advance some of humanity’s highest ideals, then we need to improve the way we manage these vital ecosystems and sustainably harness the essential resources they provide us with.

Nowhere is the need for this greater than here in Africa. Reducing poverty, creating jobs, combating climate change, ending hunger and driving sustainable economic growth on the continent – goals set out in the 2030 Agenda for Sustainable Development – will require trillions of dollars at a time when international financial assistance to Africa is on the decline.

But, despite the daunting costs involved, the potential for real transformation is there. Africa holds 30 per cent of the world’s mineral reserves, roughly 65 per cent of its arable land and 10 per cent of its internal renewable freshwater sources.

Its fisheries are estimated to be worth $24 billion and the continent boasts the second largest tropical forest in the world. These are just some of the resources that make up Africa’s vast reserves of natural capital – the environmental assets that, if managed properly, could drive the continent’s transformation.

But simply extracting these resources will not be enough to bring long-lasting change. If current population and consumption trends continue, humanity will need the equivalent of two Earths to support itself by 2030. This is clearly not viable in a world where climate change will make it even harder for the natural world to provide for our basic needs.

So, instead of simply extracting natural resources and exploiting natural capital we need to start managing them sustainably. The economic incentives for this are compelling. Africa alone could save as much as $103 billion every year by harnessing its natural capital in a sustainable way – money that could then be pumped back into alleviating poverty, providing access to clean energy and improving education and health.

There are even more savings to be made by stemming the illicit flow of money from illegal logging, the illegal trade in wildlife, illegal fishing, illegal mining practices and degraded ecosystems.

In addition, sub-Saharan Africa currently spends $35 billion every year on food imports, a vast amount when you consider that only 3.5 million hectares out of a possible 240 million hectares of land suitable for wetland rice cultivation have been exploited.

By one of the most conservative estimates, the illegal plunder of the continent’s natural resources, its food imports and the damage done to its ecosystems loses Africa $195 billion every year.

This astonishing figure exceeds the total amount of money that Africa requires every year to invest in improving infrastructure, healthcare and education, and combating climate change – all key goals of the 2030 Agenda.

If Africa is to achieve the sustainable development goals, then it is vital that we reverse these losses. This will require governments to roll back the damage done to ecosystems and tackle illicit financial flows. We can then redirect the recovered funds back into African economies and ensure that these funds are used to boost natural capital-based sectors like clean energy and agriculture.

The benefits of doing this are clear. In Africa, simply increasing crop yields by 10 per cent equates to a seven per cent reduction in poverty. Providing access to clean energy will reduce the indoor pollution that kills 600,000 people every year on the continent. And reversing environmental degradation and prioritising healthy ecosystems not only combats climate change but also helps to tackle desertification and reduce biodiversity loss.

This coming week, countries will meet in Nairobi for the United Nations Environment Assembly (UNEA) – the world’s most powerful decision-making body on the environment.

At UNEA, Botswana, the DRC, Kenya and Zimbabwe will table a resolution that seeks to develop policies and programmes that will enable countries to sustainably harness natural capital, crack down on illicit financial flows, reverse the degradation of environmental assets and foster international co-operation.

It is crucial that the world come together to pass this resolution so that we can expand and diversify our economies, create jobs, achieve food security, enhance the productivity of our ecosystems and achieve a more inclusive society.

These are noble ideals that we urgently need to make a reality. This is the Africa that we want and it is the future that people all over the world deserve.

Tshekedi S. Khama is Botswana’s Minister of Environment, Wildlife and Tourism