There is no need for mandatory international targets for nations renewable energy production.

And there is no need for them :P

um, renewable energy will be expensive for buyers(in less innovative poorer countries already bearing the brink of the crisis with flooding,earthquakes,and other natural disasters thus ensuing/escalating food crises and mortality rates) and commercially benefit producers(from technologically savvy better-off developed countries not nearly as economically dependent on farmers/agriculture)

Conclusively, making it mandatory for everyone to achieve the same international standard target would be economically unfair/unwise/unfeasible/nonviable and would further widen the sieve/cleavage/crevice/gap between the rich and the poor.

We can't end carbon emissions: we exhale CO2, hello?
and dry ice is used for the latest rejuvenating youth beauty treatments.treatments. 
 
Environmental-infatuation-flammable oxygen is not necessarily a good thing,certainly fatal/dangerous in high doses. 
And Ozone (O3) just like CO(Carbon monoxide) and Sulfur (S) is not fit for breathing. 

As is obvious, fossil fuels play a great part in carbon emission. It has to be precisely eliminated to sustain good results. That is why, countries should outcome yearly planned strategies and debate these in international context. Thus, by doing this, strong steps towards more generally approved results can be easily sustained.

Even though some countries with resources are producing renewable energy at their own pace, most countries are noe. An international problem like climate change needs an international solution. A few countries will not do - all countries ned to come together to reach specific targets to make a significant impact. Countries which currently produce significant amounts of renewable energy have been doing so for a while, but the carbon emissions are getting worse. So, mandatory international targets are needed to make sure that countries whose CO2 emissions are steadily on the rise also invest in renewable energy.

If mandatory targets are not set by and international and legally binding treaty, self-issued targets will remain targets, unlikely to come to reality within a good enough timeframe.