Insects are the most varied and abundant animals outweighing humanity by 17 times, yet they are in decline in many parts of the world. Insects have been called the ‘glue’ in nature and are essential for the proper functioning of all ecosystems as pollinators, food for other animals, and recyclers of nutrients. This month the United Nations IPBES report said insect abundance has declined very rapidly in some places, and the available evidence supports a “tentative” estimate that 10% of the 5.5m species of insect thought to exist are threatened with extinction.

Leading entomologists tell Tom Heap that insects have an image problem when it comes to conservation and the first step is getting people to care about these little creatures. We hear about the weird and wonderful world of some insect species that are declining in the UK, including mayflies and dung beetles and discover just how they contribute to the systems we humans rely on. The conversion of natural environments to create farmland is one of the main causes of the decline, with the use of pesticides, urbanisation and climate change also major factors. Tom asks global pesticide manufacturer Bayer about what they’re doing to help reverse insect decline and considers how we can practically make more space for insects.

Producer: Sophie Anton

Photo credit: Dr Beynon's Bug Farm

As India votes Navin Singh Khadka travels the sub-continent to find out if environmental issues are rising up the agenda.

Amongst nations India is the third highest emitter of carbon dioxide. Its rapid pace of development is pushing emissions higher and worsening air quality. The BBC World Service Environment Correspondent visits the energy capital of India to find out if that link between development and environmental damage can be broken.

Producer: Alasdair Cross

Is the future of the planet making you depressed? Do you feel paralysed, unable to imagine the happiness of future generations? As global governments fail to respond to the existential crisis of climate change it’s understandable that some people seem unable to conjure up a sense of hope, understandable that dozens of young British women have joined the Birthstrike movement, refusing to bring more children into the world. Verity Sharp meets the eco-anxious and asks if they are ill or simply more perceptive than the rest of us.

Producer : Ellie Richold

A detailed snapshot of Earth's natural life is published this week. How sick is the planet and what can we do to reverse the damage? Tom Heap hosts a debate on the vital findings of the Intergovernmental Platform on Biodiversity and Ecosystem Services.

Tom is joined by Sir Robert Watson, Chair of the IBPES, by the writer and broadcaster Gaia Vince and by Erica McAlister, insect specialist at the Natural History Museum.

Producer: Alasdair Cross

Greta Thunberg and the global youth strikes for the climate have directed the worlds attention to the potential future they face on a warming planet. The words and actions of these young people have been noted by global leaders and promises of change have been made but for their efforts to have a lasting impact the promises need to become policy. Tom Heap asks one of the young organisers Tom Bedford if young people are really changing the narrative on climate change.

The strikers' demands that the UK government recognises that we are living through a climate emergency has been taken up by some local councils whilst in the US proposals for a 'Green New Deal' are being taken seriously and Greta Thunberg has been nominated for a Nobel Peace Prize. It seems young people's hope and energy is having an impact but to really change the planet's trajectory they need to bring more of their generation with them and convince the rest of society that their future demands sacrifice today.

Producer Helen Lennard

Where does Brexit leave the UK countryside? Tom Heap hosts a studio debate. On the panel: Shaun Spiers from the environmental think-tank, the Green Alliance; Heather Hancock, director of rural-based consultancy 'Rural Solutions', chair of the Food Standards Agency, and former chief executive of the Yorkshire Dales National Park Authority and Patrick Holden, founding director of the Sustainable Food Trust,.

Producer: Emma Campbell

Wolves were hunted out of many European countries over a century ago. In recent years they've been migrating back naturally and have now reached every country in continental Europe. Not everyone is happy - while their preferred food source is said to be deer and wild boar the killing of sheep and goats has angered many farmers. Tom Heap travels to the French Alps, meeting farmers to see if its possible to rear livestock alongside a wolf population and hears about projects to help - including an innovative scheme where volunteers camp out to protect the sheep. Tom's taken his own camping gear in the hope of getting closer to these creatures and hearing or possibly seeing them.

Producer: Anne-Marie Bullock

Fast fashion is responsible for more emissions than shipping and aviation combined and by 2050 could account for a quarter of the world’s carbon budget. Consumers have been informed about the ethical alternatives but whilst sales of more sustainably sourced clothes are increasing, the biggest success of 2018 was a fast fashion brand which often sells dresses for less than the cost of their postage.

After grilling the fashion industry, the House of Commons Environmental Audit Committee has recommended action to curb throwaway culture at an industry level. But can regulation really change a nation of shopaholics who buy more clothes than the people of any other country in Europe? Lucy Siegle finds out how social media has fuelled a huge increase in consumption and how regulation, industry leaders and new generations of consumers and campaigners may finally force the industry to curb its excess.

Producer: Helen Lennard

Around 90% of homes in Britain get their hot water and heating from gas-fired boilers. There are 23 million of them in Britain. The Chancellor has banned them from new homes after 2025 and by 2050 they'll be history. The government is committed to phasing them out to meet international climate change commitments.

So what are the alternatives to the gas that's provided reliable, reasonably priced heat since it was first piped ashore from the North Sea in the late 1960s? Electric heating is a quick and easy replacement but we would need to massively increase the amount of green electricity that we generate. Hydrogen gas could be burnt in home appliances but producing hydrogen takes a lot of energy and expensive new infrastructure would be needed.

Peter Gibbs is on the hunt for solutions, basing himself in the valleys of South Wales where energy companies and their customers are trialling new fuels, new smart technology and new payment methods to cut the carbon from heating our homes.

Producer: Alasdair Cross

Clean air - the fightback: Tom Heap investigates the problems caused by air pollution, and asks how it affects children's health. He visits schools in Manchester and London and finds out about new initiatives which hope to try to reduce pollution around school sites.

Produced by Emma Campbell