Let's start with waste weight reduction

In the "Yokohama 3R Dream (Slim) Plan (Yokohama City General Waste Management Basic Plan)" formulated in January 2011, the total amount of waste (total amount of waste and resources) was reduced by more than 10% compared to FY2009 (2009) and reduce greenhouse gases emitted from waste disposal by 50% or more compared to FY2009 (2009) by FY2025). We aim to promote global warming.
As a future city of SDGs, while promoting initiatives for de-global warming throughout Yokohama City, efforts to de-global warming are also important in the waste field, so we will cooperate with Yokohama City's global warming countermeasures plan And set greenhouse gas reduction targets.

For the results of greenhouse gas emissions, please see the page on "Greenhouse Gas Emissions from Waste Management" page.

Greenhouse gas emissions in the goals of the “Yokohama 3R Dream (Slim) Plan” include the reduction effect of waste power generation to the calculation method of the local government action plan system based on the Act on Promotion of Global Warming Countermeasures.
The following is an approach to estimating greenhouse gas emissions in each process.

• We calculate the amount of greenhouse gas discharged from collection vehicles when Yokohama City collects garbage and recyclables from homes. This is calculated based on the fuel consumption and mileage of collection vehicles.
• We calculate the amount of greenhouse gases equivalent to the amount of electricity and gas used in facilities such as collection offices, incineration plants, and resource sorting centers related to waste disposal.
• The amount of greenhouse gases generated when burning garbage at incineration plants is calculated from the amount of burnable garbage.
• The incineration plant uses the heat generated when burning garbage to generate electricity, and sells the surplus power. Selling electricity to power companies can reduce greenhouse gas emissions, such as by reducing the amount of fossil fuel used when power companies generate electricity. Calculate the amount of reduction.

The amount of waste generated by incineration of waste is the majority.

Most of the greenhouse gases generated when incinerated garbage are accounted for by plastics and synthetic fibers made from fossil fuels. Among them, most of them are from the incineration of plastics.
In addition, carbon dioxide is generated even when incinerating paper, kitchen garbage, and vegetation, but since plants are derived from the carbon dioxide absorbed from the atmosphere during the growth process. (This idea is called carbon neutral) and carbon dioxide in the atmosphere does not increase, so it is not included in greenhouse gas emissions.
Regardless of the type of garbage such as plastic or kitchen garbage, incineration of garbage also generates greenhouse gases other than carbon dioxide (methane, nitrous oxide). These gases typically generate a very small amount compared to carbon dioxide, but have a stronger greenhouse effect than carbon dioxide. Reducing garbage such as paper, kitchen garbage, and vegetation leads to a reduction in the amount of methane and nitrous oxide generated. In addition, it also reduces the carbon dioxide generated when transporting them (such as those derived from the driving of collection vehicles).

Some burnable garbage are still burned without being separated.
In particular, be sure to separate plastic containers and packaging and PET bottles, which are plastics that emit a large amount of greenhouse gases by incineration. Please see the "garbage composition survey" page for the separation cooperation rate indicating the percentage of recyclables being properly sorted.