“The 400 parts per million threshold is of great symbolic importance,” said the previous WMO secretary-general Michel Jarraud in 2014. “It should serve as yet another wakeup call about the constantly rising levels of greenhouse gases which are driving climate change and acidifying our oceans.”
This triggered droughts in tropical regions and reduced the capacity of “sinks” like forests, vegetation and the oceans to absorb CO2.
These sinks currently absorb about half of CO2 emissions but there is a risk that they may become saturated, which would increase the fraction of emitted carbon dioxide which stays in the atmosphere, according to the Greenhouse Gas Bulletin.
Carbon Dioxide Remains For Thousands of Years. The danger is clear: for thousands of year’s carbon dioxide remains in the atmosphere, trapping heat and causing the earth to warm further. The lifespan of carbon dioxide in the oceans is even longer. It is also the single most important greenhouse gas emitted by human activities.
According to the WMO it is responsible for 85 per cent of the warming effect on our climate over the past decade. On the other hand, the United Nations Convention to Combat Desertification (UNCCD) says that the droughts and floods beating down on communities in many parts of the world are linked to the current El Niño, which was expected to affect up 60 million people already by last July.
“In some areas, including in North Eastern Brazil, Somali, Ethiopia, Kenya and Namibia, the El Niño effects are coming on the back of years of severe and recurrent droughts. It is impossible for households that rely on the land for food and farm labour to recover, especially when the land is degraded,” says in this regards the UNCCD executive secretary, Monique Barbut.
What’s more, Barbut adds, these conditions do not just devastate families and destabilise communities. When they are not attended to urgently, they can become a push factor for migration, and end with gross human rights abuses and long-term security threats.
“We have seen this before – in Darfur following four decades of droughts and desertification and, more recently, in Syria, following the long drought of 2007-2010.”
t is “tragic to see a society breaking down when we can reduce the vulnerability of communities through simple and affordable acts such as restoring the degraded lands they live on, and helping countries to set up better systems for drought early warning and to prepare for and manage drought and floods,” according to Barbut.
For its part, the Food and Agriculture Organization of the United Nations (FAO) alerted that the rapid change in the world’s climate is translating into more extreme and frequent weather events, heat waves, droughts and sea-level rise.
he impacts of climate change on agriculture and the implications for food security are already alarming – they are the subjects of this report, according to FAO director general José Graziano da Silva.
A major finding is that there is an urgent need to support smallholders in adapting to climate change. Farmers, pastoralists, fisher-folk and community foresters depend on activities that are intimately and inextricably linked to climate – and these groups are also the most vulnerable to climate change.
“They will require far greater access to technologies, markets, information and credit for investment to adjust their production systems and practices to climate change.”
Unless action is taken now to make agriculture more sustainable, productive and resilient, climate change impacts will seriously compromise food production in countries and regions that are already highly food-insecure, Graziano da Silva alerts.
“Through its impacts on agriculture, livelihoods and infrastructure, climate change threatens all dimensions of food security. It will expose both urban and rural poor to higher and more volatile food prices.”
According to FAO’s director general, it will also affect food availability by reducing the productivity of crops, livestock and fisheries, and hinder access to food by disrupting the livelihoods of millions of rural people who depend on agriculture for their incomes.
The FAO report–The State of Food and Agriculture 2016, describes ways of adapting smallholder production to climate change and making the livelihoods of rural populations more resilient.