Thus, the implementation period for mitigation targets is divided into two periods, the first short- and medium-term from 2020 to 2030, and the second long-term from 2031 to 2050. â¢ Reduction of 37% of non-absorbed emissions from the BAU scenario Mid-term 2030 â¢ Carbon neutrality Long-term 2050The reduction levels for the medium-term scenario are specified in an eq.) of the annual non-absorbed emissions from the Business as usual scenario from here to 2030.