Plastics: Agriculture

Wera Hobhouse Excerpts

Wednesday 21st November 2018 Westminster Hall

[Scott Mann (North Cornwall) (Con)]

I beg to move,

That this House has considered the use of plastics in agriculture.

It is a pleasure to serve under your chairmanship, Sir Christopher.

My constituents in North Cornwall are incredibly concerned about the environment, for a number of reasons. Perhaps most importantly, it is because we are a coastal constituency with a great deal of communities reliant on the sea, like the Minister’s constituency of Suffolk Coastal. It might also be because of the beautiful inland landscape of our countryside. Arguably the biggest threat to the environment, other than the ice caps melting, is the plastic in our seas and environments.

The invention of modern plastics transformed the world. It sped up processing and changed entirely how we store everything from food to medicine and how we wrap bulk items. However, with all the good that plastic has done in ease of use, it now poses an imminent threat. We all know that plastic is not biodegradable, and that is now coming at a price to our environment. The most noticeable damage being done to us in North Cornwall is undoubtedly plastic in the ocean. Around two months ago, I asked the Foreign and Commonwealth Office a question about marine conservation in which I congratulated Lewis Pugh on his mammoth swim from Land’s End to Dover. He did that to raise awareness of the tide of plastic we now find pouring into our oceans.

[Wera Hobhouse (Bath) (LD)]

I congratulate the hon. Gentleman on securing this important debate and raising this issue. Does he agree that quite a lot of the issues are caused by commercial waste collectors that do not make plastic recycling easy, particularly for businesses?

[Scott Mann]

The hon. Lady makes an exceptionally good point. I will come on to talk about the environmental impact of industrial plastics later on. There needs to be a wider debate about not only residential waste but commercial waste.

Just last month, The Guardian reported that microplastic fragments are now finding their way into human stool samples. It is incredibly worrying that plastic is now entering the human food chain. Polypropylene and polyethylene terephthalate were the plastics most commonly found. Although there is still little data on the long-term implications of those microplastics for the human body, it is causing serious concern.

Our food comes from our agricultural industry, which we rely heavily on. It relies on the use of plastics, and it is there that I believe we can make some progress. Plastics and the environment is a key issue in my constituency and for future generations. I am sure many Members have similar talks when they go into their local primary and secondary schools, but when I visit schools in my constituency, the first question they ask me, after my favourite football team—it is Plymouth Argyle, by the way—is always an environmental one. Often it is about plastics.

I certainly welcome the amazing progress that the Government have already made. We have made a commitment to leave the environment in a better place than we found it. We have seen progress in legislation to tackle the scourge of plastics in our environment. We implemented the ban on the manufacture of products containing microbeads, and the coalition introduced the 5p carrier bag charge. At the time, I was slightly sceptical about that, but it has definitely changed behaviour, taking 9 billion bags out of circulation. There are the recent proposals for a bottle deposit scheme, which I welcome, and a ban on the sale of plastic straws, stirrers and plastic-stemmed cotton buds. Most recently, the Chancellor has announced consultation on a world-leading tax on plastic packaging that does not include at least 30% recycled content.

Those policies are part of a cultural change in how the public view single-use plastics, and around the country we are seeing great examples of how that is coming about through grassroots organisations. Penzance recently became the first town in the country to go plastic-free, and was declared as such by Surfers Against Sewage. That was achieved by Penzance residents coming together and thinking of creative new ways of replacing plastics. For example, they have started to use food boxes made of starch. I commend the people of Penzance for their great achievement.

I welcome the nation’s action on the issue of plastics in the environment, but I want to focus specifically on plastics in the agricultural sector. In rural communities such as North Cornwall, plastics are used heavily on farms. In fact, PlasticsEurope, an association of plastic manufacturers, says on its website:

“A wide range of plastics are used in agriculture”.

Those include polyolefin and polyethylene, which tend to be used in mulch to protect saplings and conserve water. Polypropylene is used to make woven sacks for storage. Ethylene-vinyl acetate is used for sealing packaging. Polyvinyl chloride is used for plastic pipes for irrigation. Those are just a few examples of the plastics used in the agricultural space.

Those plastics provide innovative but not always sustainable ways of managing crops. Plastic irrigation pipes prevent the wasting of water and nutrients. Rainwater can be retained more effectively in plastic reservoirs. The use of pesticides can be greatly reduced by keeping crops in a closed space such as a greenhouse or by mulching under plastic film. Moreover, pesticide emissions into the atmosphere are reduced by having a fixed plastic cover in place.

At the end of their life cycle, agricultural plastics such as greenhouse covers can be recycled. Once retrieved from the fields, other plastics have to be washed to eliminate sand, herbicides and pesticides before they are ground up and extruded into pellets. That in itself is quite environmentally intensive, but the material can then be used again in the manufacturing of such things as outdoor furniture. When recycling is not viable, energy can be obtained from agricultural plastic waste through co-combustion. The recent call for evidence by Her Majesty’s Treasury on single-use plastics, “Tackling the plastic problem”, was intended to explore how changes to the tax system or charges could be introduced to reduce the amount of single-use plastics.