Human health is dependent on a healthy environment

Everything is connected – what we do to the world comes back to affect us. From our carbon emissions, plastic wastes, air pollution through to destruction of forests and marine life, these actions eventually come back to impact human health. We need to embrace a planetary health perspective where we recognize our interconnectedness and dependence on the health of nature. This will require us to change current paradigms of healthcare that are extractive to ones that are sustainable and recognise health as being embedded within social and environmental conditions.

The health sector is not only one of the most carbon intensive sectors but is also one with enormous waste. In our practices and in how we practice, we can make simple changes that make a difference. Green Practice Society is here to help you align your working life to one embracing a planetary health perspective.

Key facts

• Climate change affects the social and environmental determinants of health – clean air, safe drinking water, sufficient food and secure shelter.
• Between 2030 and 2050, climate change is expected to cause approximately 250 000 additional deaths per year, from malnutrition, malaria, diarrhoea and heat stress.
• The direct damage costs to health (i.e. excluding costs in health-determining sectors such as agriculture and water and sanitation), is estimated to be between USD 2-4 billion/year by 2030.
• Areas with weak health infrastructure – mostly in developing countries – will be the least able to cope without assistance to prepare and respond.
• Reducing emissions of greenhouse gases through better transport, food and energy-use choices can result in improved health, particularly through reduced air pollution.

Climate change is the single biggest health threat facing humanity, and health professionals worldwide are already responding to the health harms caused by this unfolding crisis.

The Intergovernmental Panel on Climate Change (IPCC) has concluded that to avert catastrophic health impacts and prevent millions of climate change-related deaths, the world must limit temperature rise to 1.5°C. Past emissions have already made a certain level of global temperature rise and other changes to the climate inevitable. Global heating of even 1.5°C is not considered safe, however; every additional tenth of a degree of warming will take a serious toll on people’s lives and health.

While no one is safe from these risks, the people whose health is being harmed first and worst by the climate crisis are the people who contribute least to its causes, and who are least able to protect themselves and their families against it - people in low-income and disadvantaged countries and communities.

The climate crisis threatens to undo the last fifty years of progress in development, global health, and poverty reduction, and to further widen existing health inequalities between and within populations. It severely jeopardizes the realization of universal health coverage (UHC) in various ways – including by compounding the existing burden of disease and by exacerbating existing barriers to accessing health services, often at the times when they are most needed. Over 930 million people - around 12% of the world’s population - spend at least 10% of their household budget to pay for health care. With the poorest people largely uninsured, health shocks and stresses already currently push around 100 million people into poverty every year, with the impacts of climate change worsening this trend.

"Natural systems in Australia are unravelling, if they collapse human society could too"