There are only two ways to decrease the impact: by decreasing the temperature from 40 °C to 30 °C and by filling the washing machine to its full load instead of running it half-full. Thus, if the t-shirt is washed at 30 °C within a full washing machine, the environmental impact would decrease further.

According to the results, the consumer should follow the following principles: (1) quality over quantity (in order to increase the t-shirt's lifetime and thus favoring consumption reduction); (2) a fuller washing machine is better; (3) avoiding the tumbler and favoring air-drying; and (4) the lower the washing temperature, the better.

It was observed that a washing temperature of 40°C instead of 60°C could cut the carbon footprint of the use phase by 45% and 30°C instead of 40°C by 40%.

It can be noticed that wool ber consumes lower energy and also leads to lower carbon footprint than the other listed fibers, except hemp fibers, which have the lowest carbon footprint.

Electrical energy is one of the major energy consumption sectors in the textile industry, and electrical energy is spent for driving machinery, cooling, temperature control, lighting, and of ce equipment. Among the various textile industries, the spinning industry takes the major share of electricity with 41%, followed by weaving and wet processing units.

However, energy used and CO2 emitted to manufacture 1 ton of natural fiber are much lower as compared to synthetics fibers. Production of wool fiber uses lower energy and has lower carbon footprint as compared to cotton fibers.

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