Translation of biodegradable

In addition, may i know whether you are using external resources to translate? It is very important not to copy words from other dictionaries. Better to take just the best two translations for a certain word and not all translations.
We have learned that some tenses, such as Present Tense are easier and not as complex as others. Is that right? In my opinion, tenses in English are much easier than in the Spanish language.
I studied art in Germany. I would now like to learn Spanish. Can you teach me a little Spanish? Many greetings from Ukraine. I live in a small town, near Krim, close to the Black Sea.